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Dental Material AND Ceramic

Emilija Bajraktarova-Valjakova, Vesna Korunoska-Stevkovska, Biljana Kapusevska, Nikola Gigovski, Cvetanka Bajraktarova-Misevska, Anita Grozdanov
BACKGROUND: The high esthetic expectations from the prosthodontic restorations have directed the qualitative development of the materials towards the all-ceramic materials that are capable of replacing porcelain-fused-to-metal systems. AIM: This article reviews the literature covering the contemporary all-ceramic materials and systems with a focus on the chemical composition and materials' properties; also it provides clinical recommendations for their use. RESULTS: The glass-matrix ceramics and polycrystalline ceramics are presented, as well as recently introduced machinable materials, all-zirconia and resin-matrix ceramics...
September 25, 2018: Open Access Macedonian Journal of Medical Sciences
Irena Sailer, Malin Strasding, Nicola Alberto Valente, Marcel Zwahlen, Shiming Liu, Bjarni Elvar Pjetursson
OBJECTIVES: The aim of the present review was to compare the outcomes, that is, survival and complication rates of zirconia-ceramic and/or monolithic zirconia implant-supported fixed dental prostheses (FDPs) with metal-ceramic FDPs. MATERIALS AND METHODS: An electronic MEDLINE search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective cohort studies and retrospective case series on implant-supported FDPs with a mean follow-up of at least 3 years...
October 2018: Clinical Oral Implants Research
Yu Hao, Xiaoyu Huang, Xuedong Zhou, Mingyun Li, Biao Ren, Xian Peng, Lei Cheng
Oral biofilms attach onto both teeth surfaces and dental material surfaces in oral cavities. In the meantime, oral biofilms are not only the pathogenesis of dental caries and periodontitis, but also secondary caries and peri-implantitis, which would lead to the failure of clinical treatments. The material surfaces exposed to oral conditions can influence pellicle coating, initial bacterial adhesion, and biofilm formation, due to their specific physical and chemical characteristics. To define the effect of physical and chemical characteristics of dental prosthesis and restorative material on oral biofilms, we discuss resin-based composites, glass ionomer cements, amalgams, dental alloys, ceramic, and dental implant material surface properties...
October 14, 2018: International Journal of Molecular Sciences
Stefano Pieralli, Ralf-Joachim Kohal, Kerstin Rabel, Manja von Stein-Lausnitz, Kirstin Vach, Benedikt Christopher Spies
OBJECTIVE: To assess the survival and technical complication rate of partial and full-arch all-ceramic implant-supported fixed dental prostheses (P-FDP/FA-FDP) and supporting implants. MATERIALS AND METHODS: An electronic search through three databases (MEDLINE/Pubmed, Cochrane Library, Embase) was conducted to identify relevant clinical studies with an observation period of at least 12 months, including ≥15 patients. Reconstruction and implant survival rates, technical complications and confounding variables such as processed/installed materials, retention mode and location in the mouth were obtained...
October 2018: Clinical Oral Implants Research
Bjarni Elvar Pjetursson, Cristina Zarauz, Malin Strasding, Irena Sailer, Marcel Zwahlen, Anja Zembic
OBJECTIVES: The objective of this systematic review was to assess the influence of implant-abutment connection and abutment material on the outcome of implant-supported single crowns (SCs) and fixed dental prostheses (FDPs). METHODS: An electronic Medline search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective and retrospective studies with a mean follow-up time of at least 3 years. Patients had to have been examined clinically at the follow-up visit...
October 2018: Clinical Oral Implants Research
Islam Abd Alraheam, Caroline Nguyen Ngoc, Christopher A Wiesen, Terence E Donovan
OBJECTIVES: To assess and compare the 5-year success rate of resin-bonded fixed partial dentures (RBFPDs) fabricated from different materials. METHODS: An electronic search on 3 databases from January 1965 to March of 2017 was done for human randomized clinical trials (RCTs), and prospective and retrospective cohort studies. The key words used in the search were: Bridge OR bridges OR fixed partial OR fixed dental AND resin bonded OR Maryland OR ceramic bonded. Quality assessment was done using the Newcastle-Ottawa scale...
October 10, 2018: Journal of Esthetic and Restorative Dentistry
Carlos Enrique Cuevas-Suárez, Belinda Pimentel-García, Alejandro Rivera-Gonzaga, Carlos Álvarez-Gayosso, Adriana Leticia Ancona-Meza, Guillermo Grazioli, Eliezer Zamarripa-Calderón
The objective of this study was to evaluate the effect of radiant exposure on the chemical and physical properties of four commercial dental resin composites. The four dental resin composites used were Kalore, Admira, Tetric N-Ceram Bulk Fill, and Filtek Z350 XT. The composites were subjected to three curing protocols: 1000 mW/cm² for 5 s, 1000 mW/cm² for 10 s, and 400 mW/cm² for 25 s. The flexural strength, elastic modulus, water sorption, water solubility, degree of conversion, and polymerization shrinkage were evaluated...
October 7, 2018: Dentistry journal
Maren Teichmann, Fabian Göckler, Marcia Rückbeil, Volker Weber, Daniel Edelhoff, Stefan Wolfart
OBJECTIVES: To evaluate the clinical quality of tooth-supported crowns (SCs), implant-supported crowns (ISCs), and fixed dental prosthesis (FDPs) made of a lithium-disilicate glass-ceramic framework material (IPS Empress 2, Ivoclar Vivadent) after long-term use. MATERIALS AND METHODS: Between 1997 and 1999, 184 restorations (106 SCs, 32 ISCs, 33 FDPs, 13 diverse restorations) were placed in 73 patients. In 2012/2013, all patients with functioning restorations were invited to participate in a clinical follow-up examination...
October 1, 2018: Clinical Oral Investigations
Jason A Griggs
OBJECTIVE: To develop a novel protocol that is precise and accurate for analyzing the fracture surfaces of ceramic specimens using fractal geometry and to demonstrate its use on both clinically retrieved specimens and standard test specimens. METHODS: A MathCAD script was written to transfer data from atomic force microscope scans to the FRACTALS software of John Russ. This software provided six algorithms for analyzing surfaces, so an experiment was conducted to determine which algorithm provided the most precision in fractal dimensional increment (D*) values and to calibrate that algorithm on surfaces generated with known D* values...
September 24, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Xingting Han, Tomofumi Sawada, Christine Schille, Ernst Schweizer, Lutz Scheideler, Jürgen Geis-Gerstorfer, Frank Rupp, Sebastian Spintzyk
Cobalt-chromium (Co-Cr) alloy is a widely used base material for dental fixed prostheses. These restorations can be produced through casting technique, subtractive or additive manufacturing technologies. However, limited information is available regarding the influence of manufacturing techniques on the properties of Co-Cr alloy since most studies used different chemical compositions of Co-Cr alloy for different manufacturing methods. This study compares the mechanical properties, metal-ceramic bond strength, and microstructures of specimens produced by casting, milling, and selective laser melting (SLM) from one single Co-Cr alloy composition...
September 22, 2018: Materials
Jamie J Kruzic, Joseph A Arsecularatne, Carina B Tanaka, Mark J Hoffman, Paulo F Cesar
Dental composite and ceramic restorative materials are designed to closely mimic the aesthetics and function of natural tooth tissue, and their longevity in the oral environment depends to a large degree on their fatigue and wear properties. The purpose of this review is to highlight some recent advances in our understanding of fatigue and wear mechanisms, and how they contribute to restoration failures in the complex oral environment. Overall, fatigue and wear processes are found to be closely related, with wear of dental ceramic occlusal surfaces providing initiation sites for fatigue failures, and subsurface fatigue crack propagation driving key wear mechanisms for composites, ceramics, and enamel...
August 10, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Salim Ongun, Sevcan Kurtulmus-Yilmaz, Gökçe Meriç, Mutahhar Ulusoy
Polymer-infiltrated ceramic-network (PICN) material is a new type of material used for the hybrid abutments of dental implants. This study aimed to compare flexural strength, bond strengths, and fracture-resistance values of PICN with lithium disilicate ceramic (LDS) and to evaluate the effect of thermocycling on the tested parameters. Twenty specimens were fabricated using computer-aided design and manufacturing (CAD-CAM) technology for each material according to three-point bending ( n = 10), microshear bond strength (µSBS), and a fracture-resistance test (hybrid abutment, n = 10)...
September 11, 2018: Materials
F Santos, A Branco, M Polido, A P Serro, C G Figueiredo-Pina
Ceramic based prosthetic materials have been used in dental restorations due to their excellent aesthetic and biocompatibility. However, due to concerns related to their mechanical properties and abrasive action against natural teeth, a proper selection of these materials is crucial to preserve the occlusal interactions and prevent abnormal dental wear. The aim of this work is to compare the wear performance of Vita Enamic®, a polymer infiltrated ceramic (PIC), with that of other three commercial ceramic based dental materials - Zirconia, Leucite and Zirconia Veneered - when tested against natural teeth...
August 20, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Ahila Singaravel Chidambara Nathan, Rajdeep Tah, Muthu Kumar Balasubramanium
Background: Dental ceramics exhibit great optical properties and better esthetics due to their translucency. Concern with this material is its brittleness, which accounts for its failure. Feldspathic ceramic is the most widely used veneering ceramic. Aim and objectives: To evaluate and compare the fracture toughness of pressable feldspathic ceramics reinforced with zirconia silica nano-fibres with conventional pressable feldspathic ceramics. Materials and method: According to ISO 6872, a master die was prepared from which, Bar shaped samples were formed in acrylic resin with the specified dimensions of 4...
September 2018: Journal of Oral Biology and Craniofacial Research
Roberto De Santis, Teresa Russo, Antonio Gloria
Material structure-property relationship is strongly related to the employed process technology. Over the past years, laser processing of engineering materials has been proposed in many fields and different uses for diode lasers have been found in dentistry. In this contest, the potential of GaN- and InGaN-based laser diodes to cure dental materials was analysed. Two wavelengths of 405 nm and 445 nm were used as heat or light sources for warm condensation of gutta-percha, light transmission in dental posts and brackets or light curing of dental composites...
November 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Pekka K Vallittu, Bangalore H Durgesh, AbdulAziz A AlKheraif, Jenni Hjerppe
In dentistry, isotropic materials, such as metals, ceramics, and polymers, are used. Their properties are not related to any specific direction of the material microstructure. There is a trend toward non-metallic, adhesive, and minimally invasive dentistry. This is in line with the conceptual change seen in the automobile industry, in which the basis of car structures has changed from body-on-frame designs to unibody designs. In unibody designs, all structural parts of the body of the car mechanically form a single structural entity...
October 2018: European Journal of Oral Sciences
Yu Zhang, Brian R Lawn
OBJECTIVES: To survey simple contact testing protocols for evaluating the mechanical integrity of zirconia dental ceramics. Specifically, to map vital material property variations and to quantify competing damage modes. METHODS: Exploratory contact tests are conducted on layer structures representative of zirconia crowns on dentin. RESULTS: Sharp-tip micro- and nano-indentations were used to investigate the roles of weak interfaces and residual stresses in veneered zirconia, and to map property variations in graded structures...
August 29, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Majed Alsarani, Grace De Souza, Amin Rizkalla, Omar El-Mowafy
BACKGROUND: All-ceramic restorations have become popular and the trend is ongoing. However, the incidence of chipping within the veneering layer has been a commonly reported failure in clinical practice. OBJECTIVES: The aim of this in vitro study was to evaluate the effect of ceramic crown design (monolithic vs bi-layered) and material on the chipping resistance of molar crowns submitted to compressive cyclic loading. MATERIAL AND METHODS: Fifty identical epoxy resin replicas of a mandibular first molar with crown preparation were divided into 5 groups (n = 10) as follows: the MLD group - monolithic CAD/CAM lithium-disilicate glass-ceramic (LDGC) crowns; 30 zirconia cores were veneered with either feldspathic porcelain by hand-layering technique (ZHL) or by heat-pressing technique (ZVP), or with milled LDGC veneers and subsequently fused to the cores (ZLD); 10 porcelain-fused-to-metal (PFM) crowns acted as a control group...
January 2018: Dental and medical problems
Verena Preis, Sebastian Hahnel, Michael Behr, Martin Rosentritt
PURPOSE: To investigate the fatigue and fracture resistance of computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic molar crowns on dental implants and human teeth. MATERIALS AND METHODS: Molar crowns (n=48; n=8/group) were fabricated of a lithium-disilicate-strengthened lithium aluminosilicate glass ceramic (N). Surfaces were polished (P) or glazed (G). Crowns were tested on human teeth (T) and implant-abutment analogues (I) simulating a chairside (C, crown bonded to abutment) or labside (L, screw channel) procedure for implant groups...
August 2018: Journal of Advanced Prosthodontics
M Bashir, S Riaz, Z N Kayani, S Naseem
Zirconia, a hard-ceramic, is potential material for bone and dental implants. However, the problem limiting its application is inertness. This problem can be minimized using body compatible and non-toxic organic additives. Organic additives-based zirconia (OZ) nanoparticles are synthesized using sol-gel method. Zirconium oxychloride is used as precursor and water as solvent. OZ nanoparticles are calcined in the temperature range of 100-1000 °C. Transition from mixed zirconia phases to amorphous behavior is observed at 300 °C...
July 25, 2018: Journal of the Mechanical Behavior of Biomedical Materials
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